Ore-roaster.



.UNITED sTATns PATENT OFFICE.

JAMES w. BOILEAU, or nnfi'aorr, MIGHIGAN, AssIoNon rro Louis c. sHERWooo, or Dn'rsoir, memoria.

ORE-ROASTEH.

Specifloation of Letters Patent.

ratenzea may e, 190o.

Application flled .land 18. 1903. Serial No. 161,247.

glhe invention relatos to a paratus intended for use in the roasting o ores.

It `is the 'object of'the mvention tc obtain a construction in Vwhich the ore is heated in al closed retort b external heeting means and is at the same time sub 'ected to internal treatment b a gaseous me 'um Which acts chem:

` icallg t ereon.

invention consists in the. peculiar con-l struction of a revolnble retort arran ed within a heating-chamber and provide With an internal perforated conduit through which the aseous medium for treating the ore is intro uced. The invention further consists in the construction and arrangement by Which the gas for internal treatment is generated b the heat of the firirnace, which also heats t e retort, and, ther,iin the peculiar construction, arrenigtement, and combination ofparts,A

as hereina er described and claimed.

In the drawings, Figure 1 is a longitudinal section through the apparatus. F ig. 2 is a cross-section thereof, and 3 is an end elevation. V V V In the Vrecent state of the art it is common ore in which the ore is fed through a revo uble cas- 'ing and is smnltaneonsly suhjected to heat within the casin It is also common to heat the ore in a revo uble retort by applying the heat'externally. A In the first type of a paratue the internal flame o r heated pr ucts of'combustion may be used both for the urpose of hcatin and also for the chemica actuation thereo on the ore. With the second type of a paratus the ore is uniforml heated by the ame, but is not chemica y acted upon.

. The apparatos which forms the snbjectmatter o this invention combines the advan- 'tages of both types of apparatus abovereferred to, first, by heating the ore chiefl by the' external heating'means, and, secon by to a collecting a paratus.

i1:' are used WhichV engage Wit providin for the introduction into the retort of ases or the chemical treatment.

n the-constrnction shown in the drawings, A is the revoluble c lindrical casing, having a substantially horizontal axis of rotation and ta ered sufiiciently to produce the feeding of t e ore from one end to the 'other of the casmg. a

B ls an outer case or acket surroundin the cylinder A and provided at one end Wit the combustion-chamber C- and at the ofiposite end with a connection D to the stac E is a grate Within the chamber C, and F and G are respectively fuel and ash doors for said fornece. A

The revoluhe'cylinder A is o ened at each end; het theouter end is close by a stationaljg plate H. v

. is an inlet-spout passing through the pl'ateH and adapted tointroduce the ore into the cylinder. At the opposite end of the cylinder is astationa casing J, havi at its .lower end the disc ar e-spout K, t rough VWhich the ore Will be de ivered afterdropping fromfthe cylinder.

L is a conduit connected to the upper end of the casing J and adapted to cionve the Vgases frern'said chamber and the e lin cr A (Not own.) The cylinder is supported, preferably, upon the antifriction-rol ers L", which engage with annular fleng'es M at the ends and one or more intermediate points in the cylinder.

The cylinder is revolved by the enaement of a pinion N with an annular ra To permit of the free rotation of the cylinder and at the same time to form a tight oint With the head H and seeing J looking-rings li fianges Q on the cylinden. Similar Vri 's are arranged at opposite ends of the outer Jacket and engage with similar flanges on the cylinder.

R is a conduit assing. longitudinally through the e linder referably in the line of the axis t ercof.f V e inner end of this conduitis ea ped, While the outer end passes through the ead H.

S represents a. plurality of distributingpipesdepend' from theconduit R within the cy inder, and :resents longitudinally-extending perfora v ipes connected to said distributmg-pipes. preferabl% employ a number of the perforated pipes which are IGG arranged in arallelism and euidistant from the axis of t e cylinder, as s own in Fig. 2. The inner end of the conduit R may be supported` by suitable means, such as the depending bracket U on the casing J.

For suppl ing the gas to the conduit R the enerators are arranged adjacent to the rnace-chamber C, preferably upon opposite sides thereof. These retorts are adapted to receive any suitable material for the generation of the particular gas or gases which it is desired to use in the chemical treatment of the ore. i

The apparatus being constructed as shown and described, in operation the combustion of the fuel withinthe furnace-chamber C will heat the cylinderA. At the same time the cylinder A is revolved through the medium of the pinion N and rack O and the ore is fed into the upper end of the cylinder through the chute The heat Within the furnacechamber will also be communicated to the retorts `V, vaporizing or asifying the material contained therein, w `ch gases ar conveyed through a connecting-conduitW to the conduit R. 'From the latter the gases are distributed through the pipes S to the perforatedpipes T, Where they will escape through the a ertures in said pipe, and in case a combusti le gas is used Will burn in contact With the ore on the bottom of the cylinder,

It Will be evident from the o eration as above described that the ore wii be slowly fed through the cylinder A and during this movement Will' first be thoroughly heated by the external heat applied tothe cylinder and Will then be subjected to the actuation of the gases issuing from the pipes T. ,The result is that a perfectly uniform treatment is given to all portions of the ore, Which after leavin the lower end of the cylinder pass out throug the spout K, while the gaseous products are conveyed through the pipe L. p

One advantage of this form of apparatus is that a comparatively small quantity of as is required for the chemical treatment o the ore Whereas in ap aratus of the t pe in which the ore is roaste solely by the game re uirmg a relatively large Iamount of gas. ex ensive materials may be used for generatin the gas for the conduit R which could not e used for heating the ore.

Another o b'ect of the present type of apparatus is that t e arrangement of the retorts V adjacent to the furnace-chamber Will cause the simultaneous heating of the ore and generation of gases for its chemical treatment.

What I claim as my invention-is- 1. A roaster comprising a retort, a fu'nace e for heating' the same externally 'a receptacle' arranged outside of but adjacent to thewall hus of the furnace and means for' simultaneosly introducing within said retort a gaseous agent generated within said receptacle for chemically treating the materi roasted.

2. A roaster com ris a rotary retort, a surrounding cylindrical casing havin at one end a combustion-chamber whereby t e products of combustion may surround said retort, a conduit extending centrally through said retort and having apertured branches communicating with the interior surface of the retort, gas-generators secured res ectively to the outer surface of the sides o the casin surrounding the combustion-chamber, sai generators having communication With said conduit.

3. A roaster comprising a rotary retort revoluble about a' substantially horizontal axis, a surrounding combustion-chamber, generators associated With the o positesides of said combustion-chamber, ans a conduit communicating with said generators andiextending into said retort havin jet-apertures directed against the materia on the bottom of said retort.

4. A roaster comprising a rotary retort, tapering from its forward smaller end rear- Wardly, a combustion-chamber arranged adjacent said smaller end and terminati at its upper portion in an elongated rearwar ly-extending cylindrical casing surroundingthe retort, and directing the products of combustion around the latter, rectangular gasgenerators arranged at the respective sides of the combustion-chamber whereby the heat therefrom will ators, land con ator',"`s`aid conduits being connected at their u per ends and terminating in an a ertured e ongated conduit extending central ywithin `said retort. f

5. A roaster comprising a rotary retort, a combustion-chamber havin a rounding the retort, where y t e products of combustion will pass therearound, a gasgenerator attached to the outer surface of the wall of the combustion-'chamber, said wall of the combustion-chan'iber constituting one wall of the as-generator, whereb `the material in sai generator will be in irect contact With the Wall of the combustion-chamgenerate the gas insaidgeneri uits connected to the genery IOO ortion sur- IIO ber to be generated thereby, and a conduit connected to the generator and terminating in an a ertured elongated conduit extending centralFy within said retort.

In testimony Whereof I affix my signature in presence of two Witnesses.

. JAMES W. BOILEAU. v Witnesses:

JAS. IP. BA'BRY, H. C. SMITH. 

